first commit

server/internal/notify/telegram.go

@@ -0,0 +1,54 @@
+package notify
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type TelegramNotifier struct {
+	client *http.Client
+}
+
+func NewTelegramNotifier() *TelegramNotifier {
+	return &TelegramNotifier{client: &http.Client{Timeout: 10 * time.Second}}
+}
+func (n *TelegramNotifier) Type() string              { return "telegram" }
+func (n *TelegramNotifier) SensitiveFields() []string { return []string{"botToken"} }
+
+func (n *TelegramNotifier) Validate(config map[string]any) error {
+	if strings.TrimSpace(asString(config["botToken"])) == "" || strings.TrimSpace(asString(config["chatId"])) == "" {
+		return fmt.Errorf("telegram botToken/chatId are required")
+	}
+	return nil
+}
+
+func (n *TelegramNotifier) Send(ctx context.Context, config map[string]any, message Message) error {
+	if err := n.Validate(config); err != nil {
+		return err
+	}
+	botToken := strings.TrimSpace(asString(config["botToken"]))
+	chatID := strings.TrimSpace(asString(config["chatId"]))
+	payload, err := json.Marshal(map[string]any{"chat_id": chatID, "text": message.Title + "\n\n" + message.Body})
+	if err != nil {
+		return fmt.Errorf("marshal telegram payload: %w", err)
+	}
+	request, err := http.NewRequestWithContext(ctx, http.MethodPost, "https://api.telegram.org/bot"+botToken+"/sendMessage", bytes.NewReader(payload))
+	if err != nil {
+		return fmt.Errorf("create telegram request: %w", err)
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := n.client.Do(request)
+	if err != nil {
+		return fmt.Errorf("send telegram request: %w", err)
+	}
+	defer response.Body.Close()
+	if response.StatusCode >= http.StatusBadRequest {
+		return fmt.Errorf("telegram response status: %s", response.Status)
+	}
+	return nil
+}